/*
 * @BEGIN LICENSE
 *
 * Psi4: an open-source quantum chemistry software package
 *
 * Copyright (c) 2007-2025 The Psi4 Developers.
 *
 * The copyrights for code used from other parties are included in
 * the corresponding files.
 *
 * This file is part of Psi4.
 *
 * Psi4 is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3.
 *
 * Psi4 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with Psi4; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * @END LICENSE
 */

#ifndef _psi_src_lib_libpsio_config_h_
#define _psi_src_lib_libpsio_config_h_

#include "psi4/pragma.h"

namespace psi {

#define PSIO_OPEN_NEW 0
#define PSIO_OPEN_OLD 1

#define PSIO_KEYLEN 80
#define PSIO_MAXVOL 8
#define PSIO_MAXUNIT 500
#define PSIO_PAGELEN 65536

#define PSIO_ERROR_INIT 1
#define PSIO_ERROR_DONE 2
#define PSIO_ERROR_MAXVOL 3
#define PSIO_ERROR_NOVOLPATH 4
#define PSIO_ERROR_OPEN 5
#define PSIO_ERROR_REOPEN 6
#define PSIO_ERROR_CLOSE 7
#define PSIO_ERROR_RECLOSE 8
#define PSIO_ERROR_OSTAT 9
#define PSIO_ERROR_LSEEK 10
#define PSIO_ERROR_READ 11
#define PSIO_ERROR_WRITE 12
#define PSIO_ERROR_NOTOCENT 13
#define PSIO_ERROR_TOCENTSZ 14
#define PSIO_ERROR_KEYLEN 15
#define PSIO_ERROR_BLKSIZ 16
#define PSIO_ERROR_BLKSTART 17
#define PSIO_ERROR_BLKEND 18
#define PSIO_ERROR_IDENTVOLPATH 19
#define PSIO_ERROR_MAXUNIT 20
#define PSIO_ERROR_UNOPENED 21

struct psio_address {
    /*! First page of entry */
    size_t page;
    /*! Starting byte offset on fpage */
    size_t offset;
};

struct psio_vol {
    char *path;
    int stream;
};

typedef struct psio_entry {
    char key[PSIO_KEYLEN];
    psio_address sadd;
    psio_address eadd;
    struct psio_entry *next;
    struct psio_entry *last;
} psio_tocentry;

struct psio_ud {
    size_t numvols;
    psio_vol vol[PSIO_MAXVOL];
    size_t toclen;
    psio_tocentry *toc;
};

/** A convenient address initialization struct */
extern PSI_API psio_address PSIO_ZERO;
}

#endif /* header guard */
